Biodegradable shape memory nanocomposites with thermal and magnetic field responsiveness
Abstract
Thermal and magnetic field responsive biodegradable shape memory polymer nanocomposite was prepared with Fe3O4 nanoparticles and poly(L-lactides) (PLLA). The magnetic Fe3O4 nanoparticles with an average size of 9 nm were initially synthesized by co-precipitation method and then followed by surface modification using oleic acid. The TEM and SEM results show that the surface modified Fe3O4 nanoparticles can evenly disperse in chloroform and PLLA polymer matrix. The tensile test results show that the addition of Fe3O4 nanoparticles to a PLLA matrix greatly improved the elastic modulus, tensile strength, elongation at break, and the shape memory properties as well. Moreover, the shape recovery process of the nanocomposites driven by an alternating magnetic field was also observed. However, the shape recovery ratio and the recovery speed in an alternating magnetic field are lower than that occurred in 70 °C water. The lower shape recovery ratio and the recovery speed in an alternating magnetic field is attributed to the low frequency and strength of the magnetic field, which lead to small heat generated by Fe3O4 nanoparticles.
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Evenly dispersed nanofiller (up to 20 wt%) led to an improvement of the mechanical properties of the materials (elastic modulus, tensile strength and elongation at break) as well as their shape-memory properties.
“The evenly dispersed nanofiller (up to 20 wt%) led to an improvement of the mechanical properties of the materials (elastic modulus, tensile strength and elongation at break) as well as their shapememory properties.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [158]
The lower shape recovery ratio and recovery speed were attributed to the low frequency and strength of the magnetic field, which lead to the small heat generated by the Fe3O4 NPs.
“In this case the authors attributed the lower shape recovery ratio and the recovery speed to the low frequency and strength of the magnetic field, which lead to the small heat generated by the Fe3O4 NPs [158].”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [158]
Higher Fe3O4 NPs content (30 or 40 wt%) led to a deterioration of these properties as a result of the NPs agglomeration inside the polymer matrix.
“Higher Fe3O4 NPs content (30 or 40 wt%) led to a deterioration of these properties as a result of the NPs agglomeration inside the polymer matrix.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [158]
The shape recovery ratio in PLLA/Fe3O4 (nanofiller content 10 wt%) and the recovery speed in an alternating magnetic field are lower than that occurred in water at 70°C.
“However, the shape recovery ratio in PLLA/Fe3O4 (nanofiller content 10 wt %) and the recovery speed in an alternating magnetic field are lower than that occurred in water at 70 ° C (Fig. 13(a)).”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [158]
Fe3O4 NPs synthesized by co-precipitation followed by surface modification using oleic acid were incorporated in PLLA.
“Fe3O4 NPs initially synthesized by co-precipitation method followed by their surface modification using oleic acid were incorporated in PLLA.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [158]
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- Authors
- Zhang, X., Lu, X., Wang, Z., Wang, J., & Sun, Z.
- Affiliations
- Harbin Engineering University (CN)
- Corresponding author
- Lu, Xili
- Venue
- Journal of Biomaterials Science Polymer Edition
- Publisher
- Informa UK Limited
- Published
- 2012-10-15
- Volume
- 24
- Issue
- 9
- Pages
- 1057-1070
- ISSN
- 0920-5063 (ISSN-L)
- 1568-5624
- OpenAlex
- W2069670913
- Cited by
- 28
- References
- 22
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 2 · 2017: 4 · 2016: 3 · 2015: 2 · 2014: 2 · 2013: 1
- FWCI
- 1.26
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Biomaterials Science Polymer Edition (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China
- Fundamental Research Funds for the Central Universities
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Keywords
- shape memory polymers, biodegradable nanocomposites, Fe3O4 nanoparticles, poly(L-lactic acid), thermal responsiveness, alternating magnetic field, shape recovery, oleic acid surface modification, co-precipitation synthesis, mechanical properties, magnetic hyperthermia
- MeSH terms
- Biocompatible Materials, Materials Testing, Microscopy, Electron, Scanning, Particle Size, Polyesters, Polymers, Temperature, Tensile Strength, Thermodynamics, X-Ray Diffraction, Lactic Acid, Coated Materials, Biocompatible, Absorbable Implants, Ferrosoferric Oxide, Nanocomposites, Magnetite Nanoparticles, Magnetic Fields
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